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authorAndré Fabian Silva Delgado <emulatorman@parabola.nu>2015-08-05 17:04:01 -0300
committerAndré Fabian Silva Delgado <emulatorman@parabola.nu>2015-08-05 17:04:01 -0300
commit57f0f512b273f60d52568b8c6b77e17f5636edc0 (patch)
tree5e910f0e82173f4ef4f51111366a3f1299037a7b /Documentation/devicetree/bindings/spi/spi-fsl-dspi.txt
Initial import
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+ARM Freescale DSPI controller
+
+Required properties:
+- compatible : "fsl,vf610-dspi"
+- reg : Offset and length of the register set for the device
+- interrupts : Should contain SPI controller interrupt
+- clocks: from common clock binding: handle to dspi clock.
+- clock-names: from common clock binding: Shall be "dspi".
+- pinctrl-0: pin control group to be used for this controller.
+- pinctrl-names: must contain a "default" entry.
+- spi-num-chipselects : the number of the chipselect signals.
+- bus-num : the slave chip chipselect signal number.
+
+Optional property:
+- big-endian: If present the dspi device's registers are implemented
+ in big endian mode, otherwise in native mode(same with CPU), for more
+ detail please see: Documentation/devicetree/bindings/regmap/regmap.txt.
+
+Optional SPI slave node properties:
+- fsl,spi-cs-sck-delay: a delay in nanoseconds between activating chip
+ select and the start of clock signal, at the start of a transfer.
+- fsl,spi-sck-cs-delay: a delay in nanoseconds between stopping the clock
+ signal and deactivating chip select, at the end of a transfer.
+
+Example:
+
+dspi0@4002c000 {
+ #address-cells = <1>;
+ #size-cells = <0>;
+ compatible = "fsl,vf610-dspi";
+ reg = <0x4002c000 0x1000>;
+ interrupts = <0 67 0x04>;
+ clocks = <&clks VF610_CLK_DSPI0>;
+ clock-names = "dspi";
+ spi-num-chipselects = <5>;
+ bus-num = <0>;
+ pinctrl-names = "default";
+ pinctrl-0 = <&pinctrl_dspi0_1>;
+ big-endian;
+ status = "okay";
+
+ sflash: at26df081a@0 {
+ #address-cells = <1>;
+ #size-cells = <1>;
+ compatible = "atmel,at26df081a";
+ spi-max-frequency = <16000000>;
+ spi-cpol;
+ spi-cpha;
+ reg = <0>;
+ linux,modalias = "m25p80";
+ modal = "at26df081a";
+ fsl,spi-cs-sck-delay = <100>;
+ fsl,spi-sck-cs-delay = <50>;
+ };
+};
+
+